TEST FUNCTIONS for Unconstrained Global Optimization Ackley Function r Number of variables: n variables.

i need solution this function with a main program

function y = ackley(x)
 %  % Ackley function. 

% Matlab Code by A. Hedar (Sep. 29, 2005). 
% The number of variables n should be adjusted below. 
% The default value of n =2. %  n = 2;
 a = 20; b = 0.2; c = 2*pi; 
s1 = 0; s2 = 0; 
for i=1:n; s1 = s1+x(i)^2; s2 = s2+cos(c*x(i)); 
end
y = -a*exp(-b*sqrt(1/n*s1))-exp(1/n*s2)+a+exp(1);

[Walter Roberson]

It is not clear what you are asking for?